Constructional material



Jan. 2l.,` 1930. A. c. FISCHER cNsTRUGTIoNAL l MATERIAL Filed April 1e,` 192s Patented Jan. 2,1, 1930 UNITED STATES ra'rlzla'l-al OFFICE; j

ALBERT C. FISCHER, or CHICAGO, ILLINOIS, ASSIGNCR To THE PHILIP CAREY MANU- FACTURINGCOMPANY, ACCRPORATION OF omo CONSTRUCTION AL MATERIAL Application led April 16, 1928. SerialNo. 2.70,517.

This may be accomplished by directingai-r thru the heated mas/s so the bubbles accumulate 'against a cold-surface. By Chemical ac` l tion under pressure, wherein various chemicals are compounded, using bituminous ma'- terial as the base or bulk, the same cellular structure can' be obtained. Bicarbonate of soda, Glaubers salts, sulphur, lime'and varions chemicals may be used in varyingl proportions to accomplish the object desired;

` A mass of bituminous matter may be mixed with a fibrous substance to strengthen it, suitably illed or charged with air cells, and while in this condition suddenly chilled or immersed in cold water.

Another method by whichl the air trapping conditions may be eii'ected is to prepare a substance to increase its capillary action and then immerse the body in heated bituminous matter, and allowing the body to absorb and draw the heated bituminous matter thruits structure, thereby forming a bituminous wall about its numerous air pockets, and creating a spongy, cellularlmass, readily compressed i and of a resilient sponge-like character.

It is readily understood that the bituminous substance used may be chemically treated, air blown, tibrated and otherwise treated to secure toughness and4 rubbery consistency. This-would naturally involve many chemicals used in the treatment of rubber, sponge rubber, "and its preparation for vulcanization,

i so I do not to be limited to the nature,

body str uctureor chemical contents ci the asphalt or other bituminous material. Vegetable oils may also enter into suchV a structure it properly treated, especially for the i'nanuiacture oi expansion joints. Earthy i ztter is sometimes used to secure greater stiittness and check the inherent How tendency and adhesiveness, andprevent adhesion of the cell walls.

-This invention relates further to incorporating fiber, in which case thebituminous cellular material herein described shouldl preferably be of a very sti and tough structure and contain'considerable earthy matter to prevent adhesion of the cell Walls. One i good"medium thru which the air can be trapped'in pockets is by utilizing a matted, laminated, cellular flax structure, or one of hemp, aX and straw, which have been treated with caustic soda, thus removing the gummy matter in the straw, flax orfoth'erl vegetable fiber, thus increasing its capillary action.

The purpose of incorporating bers as a `reinforcing means is to strengthen the mass and adapt it for various uses such as rail filler blocks of various formation,etc.4 v

This invention relates to `a bituminous material comprising a cellular construction formed by gas forming means, and having distributed therethru earthy material and fiber, saidy earthy material being jaketed by bituminous material, and said structure being reinforced by fibers.

In the accompanying drawing, Figure 1 illustrates the bituminous material i), with the earthy material a distributed therethru, and liber c. u

Figure 2 illustrates this material in block formation.

vliber c for reinforcingthey gether by fibers homogeneously distributed therethru.

2. Rail filler comprising a preformed blocklike structure consisting of bituminous 5 materialin cellular formation7 earthy inaterial to preventadhesion of the cell walls and the mass bound together by fibers distributed therethru.

3. A blocklike structure comprising a homogeneous mixture of bituminous inaterial in cellular form, earthy material to prevent adhesion of the cell Walls, and fibers distributed throughoutthe structure.

4. A paving structure comprising a foundation layer, a Waterproofing layerof preformed bituminous slabs over the foundation layer and surfacing blocks secured to. the Waterproofing layer.

5. A paving structure comprising a foundation layer, a waterproofing layer of preformed bituminous slabs composed of bituminous and earthy material, and surfacing blocks secured to the Waterproolin'g layer.

6. A Apaving str'ucture comprising a formdation layer, and an overlying layer of preformed bituminous strips, said strips being 'formed with a yicldable body and faced with a solid bituminous coating.

7.` A paving structure comprising a foundation layer, and an overlying bituminous layeradhesively united to the foundation `nla er, said bituminous layer being formed with a yieldablel body and faced With a solid bituminous coating. f

8. A paving structure comprising a foundation layer, and an overlying bituminous layer vadhesively united to the foundation layer, said bituminous layer being formed of 'saturated fibers and faced with a solid bitu- 40 minous coating.

Signed at Chicago, Illinois, this 22nd day of March 1928.

ALBERT C. FSGHER. 

